A huge water storage pit was formed near the sewage outlet of Hutuo River in Jinzhou City, Hebei Province, and the water in the pit was black. (Photo by Xu Hui)
Cctv news(Reporter Xu Hui) The Hutuo River, which originated at the foot of Taixi Mountain in fan shi, Shanxi Province, runs out of Taihang Mountain in the west and runs to the sea in the east, is the largest river flowing through Shijiazhuang City and is known as the mother river of Shijiazhuang.
In recent years, Shijiazhuang has vigorously promoted the ecological restoration project of Hutuo River. Among the living environment examples of Hebei Province in 2016-2017, the Hutuo River Ecological Corridor Project in Shijiazhuang is on the list. The content of "treating the ecological environment like life, coordinating the management of landscape, forest, field, lake and grass system" put forward in the report of the 19th National Congress is reflected here.
However, a few days ago, a video of "sewage facilities are put into display and sewage is discharged into the Hutuo River" was circulated on the Internet and attracted the attention of many netizens.
At about 13 o’clock on May 4, CCTV reporters came to the video shooting place — — Longquan Gu Village, Huaishu Town, Jinzhou City, near the bank of Hutuo River, was investigated.
4 million pretreatment equipment intermittently "strikes"
The picture on the left shows the picture in the network video, showing that there is sewage flowing out of the main gate. The picture on the right shows the picture taken by the reporter on May 4, showing that water flows out from one side of the main gate. According to the relevant personnel of Jinzhou Branch of Shijiazhuang Environmental Protection Bureau, the water treated by the pretreatment pool should flow into the Hutuo River from the side of the main gate.
It is understood that the netizen who filmed and uploaded the video of "sewage equipment is decorated and sewage is discharged into the Hutuo River" is Zhou, a villager in Longquan. The video was filmed a few days ago.
The reporter arrived at the scene of the video shooting and found that the treated water flowed from the underground pipe network to the front of the main gate, with a small gate on the front side and a water outlet on the east side behind the main gate. There are a row of pretreatment tanks on both sides of the gate, and the two pretreatment tanks are connected by pipes. Before the water reaches the gate, it flows into the pretreatment pool from the small gate, and flows into the Hutuo River from the water outlet on the other side of the gate after the pretreatment pool turns around.
Compared with the video released by Zhou, it can be found that the water flowing out of the underground pipe network in the video flows directly into the Hutuo River from the main gate without passing through the pretreatment pool.
Liang Ma, a staff member of Jinzhou Branch Office of Shijiazhuang Environmental Protection Bureau, said that according to the design of the sewage outlet, what the reporter saw was normal operation, indicating that the water had been treated by the pretreatment tank.
It can be seen that the pretreatment pool does not run intermittently.
The standard water is polluted in the 12km underground pipe network.
The above picture shows the outlet of the second sewage treatment plant in Jinzhou. The water is slightly green. According to the real-time monitoring by the environmental protection department, it reaches the first-class A standard. The following picture shows the water flowing into the Hutuo River from the sewage outlet of the Hutuo River after being purified by the pretreatment tank, which is reddish brown. (Photo by Xu Hui)
The reporter found in the square on the south side of the sewage outlet of the Hutuo River in Jinzhou City that two black cars were parked here, one with the words "official car" printed on it, and four men were waiting here. Seeing the reporter taking pictures, three men came forward to ask the reporter about his origin. After identifying the identity of the reporter, the reporter was taken to Jinzhou No.2 Sewage Treatment Plant.
According to Ji Chao, deputy director of the plant, on December 28th last year, Jinzhou signed an agreement with Beijing Sander Environmental Engineering Co., Ltd., and Sander Company won the right to operate Jinzhou Sewage Treatment Plant for 30 years.
Ji Chao led the reporter to the outlet of the factory, and the reporter found that the purified water was clear and translucent. The treated water is discharged into the underground pipe network and flows to the sewage outlet of Hutuo River. "We have online monitoring equipment installed here, which operates 24 hours a day and automatically transmits monitoring data to Shijiazhuang Environmental Protection Bureau every two hours. The water flowing out from here can meet the first-class A standard and meet the specified requirements. "
The data provided by the online monitoring website of Shijiazhuang Environmental Protection Bureau also shows that the monitoring data of the first and second sewage treatment plants in Jinzhou City are qualified.
Then, why on earth is the water that has reached the standard turbid again and reddish brown when it is discharged into the Hutuo River?
Environmental protection department: investigate the pollution sources of underground pipe network
It is understood that the water treated by the first and second sewage treatment plants in Jinzhou City will be discharged to the sewage outlet of Hutuo River through a 12-kilometer underground pipe network.
Wang Limin, director of Jinzhou Branch of Shijiazhuang Environmental Protection Bureau, said that the branch had found that there was a difference in water quality between the sewage treatment plant outlet and the Hutuo River outlet, and it was suspected that the qualified water was polluted in the underground pipe network. Professionals have been hired, and the 12-kilometer underground pipe network will be investigated in the near future.
According to Wang Limin, on April 20th, some people reported that the manhole covers of underground pipe networks in the south of Qidi Village and the north of Baishui Village in Jinzhou City were lost, and unknown vehicles dumped waste liquid at night. Law enforcement officers of the Environmental Protection Bureau found a large number of rut marks on the scene, and there were traces of waste water on the ground, with obvious odor. The dumped waste liquid was discharged to the main discharge port of Hutuo River.
At present, the public security organs have filed an investigation.
Pretreatment tank is "unable to directly degrade industrial enterprise wastewater"
Pretreatment tank can reduce the content of suspended solids in the discharged water, but if it is directly used to purify the sewage of industrial enterprises, it seems to be "inadequate" (Photo by Xu Hui)
When the water source is polluted again, can the pretreatment tank play a purification role?
According to Liang Ma, the average daily sewage treatment capacity of the first and second sewage treatment plants in Jinzhou is 2200-2300 cubic meters and 40000 cubic meters respectively.
The pretreatment tank of Hutuo River sewage outlet, which was built in September 2015 with an investment of 4 million yuan, is used to further improve the water quality index of effluent from sewage treatment plant. Special high-efficiency physical and chemical flocculant is added in the pretreatment tank, which can further degrade the pollutants in the water body after contacting with water, reduce the suspended solids content in the water, and ensure that the water quality flowing into the Hutuo River reaches the standard.
The reason why the pretreatment tank is built under the sewage treatment plant and before the water flows into the Hutuo River is because this technology is based on the sewage treatment plant’s standard discharge. "If this technology is used in this kind of water produced by industrial enterprises, it should not work." Liang Ma said.
As for the intermittent shutdown of pretreatment tank, Wang Limin, director of Jinzhou Branch of Shijiazhuang Environmental Protection Bureau, said that further investigation would be made.